| 摘要 |
PURPOSE:To make the work of two joint parts easy and to secure the concentricity of both joint parts by fitting with a recessed groove to one part of the joint part and a projection part to other part of the joint part and by welding unitedly after pressing the other pat of the joint part with a rotary center. CONSTITUTION:A recessed groove is formed by a casting on a vane wheel 11 and the joint part 11a that the end face thereof is machined is formed. On the other hand the joint part 12a which is machined in a projection shape and fittable roughly to the joint part 11a of the vane wheel 11 is formed on a shaft 12. The shaft 12 is inserted into a locator 13, the vane wheel 11 is placed thereon and the joint parts 11a, 12a of the both are roughly fitted. Then, when the upper part of the vane wheel 11 is pressed by a rotary center 14, the concentricity of the vane wheel 11 and shaft 12 is maintained with the movement of the vane wheel 11 on the shaft 12 with the rotary center 14 as the standard and the both are clamped. The welding is then performed by the electron beam emitted from an electron beam irradiating device with rotating the locator 13. |
